Open Water Turn Buoys: Turning Technique and Inside/Outside Positioning Strategy

Introduction

In triathlon or open-water swimming events, every turn buoy is a critical decision point: cutting inside gives you the shortest route but carries the highest risk of collision; going wide adds distance but is often smoother. A wrong choice can leave you stalled at the buoy for 10–15 seconds, or swept along with the pack for an extra 50 meters of wasted swimming.

Turning technique has two dimensions: technical (how to round the buoy efficiently) and tactical (which line to choose). Both require pre-race planning and in-race execution.

Turning Technique: Three Common Methods

Method 1: Roll Turn

Similar to a freestyle flip turn, but executed toward the buoy in open water:

1. When you are about 1.5 meters from the buoy, take your final stroke while turning your head to sight and confirm your position
2. Draw in your core and execute a quick side roll, rotating your body toward the new course
3. Complete your breathing during the roll and continue swimming

This method has the least speed loss, but requires extensive practice to execute reliably under fatigue and crowd pressure.

Method 2: Sweep Turn

The most practical method, suitable for most intermediate-level swimmers:

1. When you are 2–3 meters from the buoy, increase your kick (accelerate your kick to maintain a high body position)
2. Use your outside arm to make a large sweeping motion (Sweep), driving your body to rotate
3. Complete roughly a 90–180 degree rotation and continue swimming normally

Key point: do not stop stroking during the turn—use the sweeping motion to combine rotation and propulsion.

Method 3: Tread Water Turn

The most conservative method: briefly tread water beside the buoy, confirm your direction, then set off again. Although the speed loss is greater, it is a safe choice when visibility is obstructed or the crowd is dense.

Positioning Strategy: A Decision Framework for Inside vs. Outside

Conditions for Choosing Inside (Near the Buoy)

• Your swimming speed places you in the front-to-middle portion of the pack
• When you reach the buoy, there is enough space between you and it (no one crowding you)
• This is the last buoy, and you will head straight for the finish afterward

Conditions for Choosing Outside (Wide Around the Buoy)

• A large number of swimmers have already gathered around the buoy by the time you arrive
• Your swimming speed is in the middle-to-back portion of the pack, and you cannot round the buoy ahead of the crowd
• The course is still long, and conserving energy matters more than shortening distance

The math: If going wide adds 5 meters but saves 10 seconds of stalled waiting, then the outside line is worth it (10 seconds ≈ about 14 meters at moderate freestyle pace).

Early Positioning Strategy

Smart swimmers do not start fighting for position at the buoy—they begin adjusting their position 100–200 meters in advance:

• Planning to go inside: Move inward early, securing your position 20–30 meters before reaching the buoy
• Planning to go outside: Let the crowd surge toward the buoy first, ease off slightly yourself, then round the outside at a faster pace once the pack has passed through
• Read the crowd density ahead: If you see a large pile-up forming at the buoy ahead, immediately decide to go wide

The Acceleration Phase After the Turn

After a turn buoy, there is usually a “settling period of chaos”—the pack has just crossed paths at the buoy and positions are reshuffling. This is your chance to overtake quickly:

• Accelerate immediately after rounding the buoy, with 8–10 full-power strokes
• Use the gaps created by the reshuffling pack to pass swimmers ahead
• Once past, drop back to cruise pace and quickly sight to confirm your direction for the new leg

Special Notes for Taiwan Events

Common open-water event buoy layouts in Taiwan:

• Sun Moon Lake Swim: Usually a one-way crossing, with buoys serving as course markers rather than turn points—relatively straightforward
• Taitung Triathlon: A triangular sea course with 2–3 turn buoys; waves add difficulty to the turns
• Chengcing Lake City Triathlon: Calm lake surface, ideal for practicing turning technique
• Challenge Taiwan Penghu: Open sea with larger wind and waves; buoys tend to drift with the swell, requiring more frequent sighting

Practical Advice

• Learn the course shape before race day: Is it triangular, rectangular, or an out-and-back? Different shapes call for different buoy strategies
• Include buoy-turn practice in training: Use water balls or buoys to simulate and practice various turning techniques
• On race day, watch from a good vantage point in the minutes before your start: Observe how other swimmers handle the buoys and learn from their in-the-moment tactics

Conclusion

Turn buoys are the point in open-water swimming where technique and strategy are most tightly fused. There is no single right answer—the same buoy might see you cut inside one day and swing wide the next, depending on the crowd situation at that moment, your energy levels, and your race plan. What matters is developing the ability to read the situation quickly as you approach the buoy and commit to a decision—a skill that only becomes instinct through extensive open-water practice.

Related Reading

• Open-Water Turn Buoy Technique: The Best Line and Speed for Staying Close to the Buoy
• Open-Water Buoy-Rounding Technique: Inside Turns and Dealing with Being Boxed In
• Reading the Course in Open-Water Racing: Judging Buoy Position and the Shortest-Distance Path
• Straight-Line Swimming Technique in Open Water: Sight Frequency and Timing for Buoy Navigation